// license:BSD-3-Clause
// copyright-holders:Nicola Salmoria
/***************************************************************************
bagman.c
Functions to emulate general aspects of the machine (RAM, ROM, interrupts,
I/O ports)
***************************************************************************/
#include "emu.h"
#include "includes/bagman.h"
/*Creation date: 98-02-18 */
/* A few words of comment:
**
** What's inside of this file is a PAL16R6 emulator. Maybe someday we will
**need to use it for some other game too. We will need to make it more exact
**then (some of the functionality of this chip IS NOT implemented). However I
**have bought a book about PALs and I'm able to improve it. Just LMK.
** Jarek Burczynski
** bujar at mame dot net
*/
/* 64 rows x 32 columns
** 1 - fuse blown: disconnected from input (equal to 1)
** 0 - fuse not blown: connected to input (ie. x, not x, q, not q accordingly)
*/
static const UINT8 fusemap[64*32]=
{
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,0,1,1,1,1,0,1,1,0,1,1,1,1,0,1,1,0,1,1,1,0,1,1,1,1,1,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1,1,0,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1,1,0,1,1,1,0,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,0,1,1,1,1,0,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1,1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,0,1,1,1,1,0,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,0,1,1,1,1,1,1,1,1,0,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1,1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,0,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,0,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1,1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,1,1,1,1,1,1,
1,1,0,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,
1,1,0,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,
1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,
1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,0,1,1,1,1,1,1,1,1,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1,1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,1,1,
1,1,0,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,
1,1,0,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,
1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,
1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,0,1,1,1,1,
1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,0,1,1,1,1,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
};
void bagman_state::update_pal()
{
UINT16 rowoffs;
UINT8 row, column, val;
/*calculate all rows ANDs*/
for (row = 0; row < 64; row++)
{
rowoffs = row*32;
val = 1; /*prepare for AND */
for (column = 0; column < 32; column++)
{
if ( fusemap[ rowoffs + column ] == 0 )
val &= m_columnvalue[column];
}
m_andmap[row] = val;
}
/* I/O pin #19 */
val = 0; /*prepare for OR*/
for (row = 1; row < 8; row++)
val |= m_andmap[row];
if (m_andmap[0] == 1)
{
m_columnvalue[2] = 1-val;
m_columnvalue[3] = val;
m_outvalue[0] = 1-val;
}
else
{
/*pin is in INPUT configuration so it doesn't create output...*/
m_columnvalue[2] = 0;
m_columnvalue[3] = 1;
}
/* O pin #18 (D1) */
val = 0; /*prepare for OR*/
for (row = 8; row < 16; row++)
val |= m_andmap[row];
m_columnvalue[6] = 1-val;
m_columnvalue[7] = val;
m_outvalue[1] = 1-val;
/* O pin #17 (D2) */
val = 0; /*prepare for OR*/
for (row = 16; row < 24; row++)
val |= m_andmap[row];
m_columnvalue[10] = 1-val;
m_columnvalue[11] = val;
m_outvalue[2] = 1-val;
/* O pin #16 (D3) */
val = 0; /*prepare for OR*/
for (row = 24; row < 32; row++)
val |= m_andmap[row];
m_columnvalue[14] = 1-val;
m_columnvalue[15] = val;
m_outvalue[3] = 1-val;
/* O pin #15 (D4) */
val = 0; /*prepare for OR*/
for (row = 32; row < 40; row++)
val |= m_andmap[row];
m_columnvalue[18] = 1-val;
m_columnvalue[19] = val;
m_outvalue[4] = 1-val;
/* O pin #14 (D5) */
val = 0; /*prepare for OR*/
for (row = 40; row < 48; row++)
val |= m_andmap[row];
m_columnvalue[22] = 1-val;
m_columnvalue[23] = val;
m_outvalue[5] = 1-val;
/* O pin #13 (D6) */
val = 0; /*prepare for OR*/
for (row = 48; row < 56; row++)
val |= m_andmap[row];
m_columnvalue[26] = 1-val;
m_columnvalue[27] = val;
m_outvalue[6] = 1-val;
/* I/O pin #12 */
val = 0; /*prepare for OR*/
for (row = 57; row < 64; row++)
val |= m_andmap[row];
if (m_andmap[56] == 1)
{
m_columnvalue[30] = 1-val;
m_columnvalue[31] = val;
m_outvalue[7] = 1-val;
}
else
{
/*pin is in INPUT configuration so it doesn't create output...*/
m_columnvalue[30] = 0;
m_columnvalue[31] = 1;
}
}
WRITE8_MEMBER(bagman_state::pal16r6_w)
{
UINT8 line;
line = offset * 4;
m_columnvalue[line ] = data & 1;
m_columnvalue[line + 1] = 1 - (data & 1);
}
void bagman_state::machine_reset()
{
address_space &space = m_maincpu->space(AS_PROGRAM);
pal16r6_w(space, 0, 1); /*pin 2*/
pal16r6_w(space, 1, 1); /*pin 3*/
pal16r6_w(space, 2, 1); /*pin 4*/
pal16r6_w(space, 3, 1); /*pin 5*/
pal16r6_w(space, 4, 1); /*pin 6*/
pal16r6_w(space, 5, 1); /*pin 7*/
pal16r6_w(space, 6, 1); /*pin 8*/
pal16r6_w(space, 7, 1); /*pin 9*/
update_pal();
}
READ8_MEMBER(bagman_state::pal16r6_r)
{
update_pal();
return (m_outvalue[6]) + (m_outvalue[5] << 1) + (m_outvalue[4] << 2) +
(m_outvalue[3] << 3) + (m_outvalue[2] << 4) + (m_outvalue[1] << 5);
/* Bagman schematics show that this is right mapping order of PAL outputs to bits.
** This is the PAL 16R6 shown almost in the middle of the schematics.
** The /RD4 line goes low (active) whenever CPU reads from memory address a000.
*/
}